Bump version to 2.0.0-1.beta2.dev.
Use Utility::GetFQDN for the NodeName variable.

Refs #6312
Remove icinga::ErrorInformation.

Fixes #6333
Fix spelling mistake.

Refs #5793
Change Vagrant VM welcome page to a more friendly one.

Fixes #6334
Vagrant: Fix finalize.sh.

Refs #6334
Vagrant: Fix index.html title.

Refs #6334
Vagrant: Fix 'vagrant ssh' for a single instance.

Refs #6334
Remove thread names from log messages.

Fixes #6345
Fix missing timer events.

Fixes #6349
Change log message identifier for components/*.

Refs #6346
Change log message identifier for libbase.

Refs #6346
Change log message identifier for libconfig.

Refs #6346
Change log message identifier for libicinga.

Refs #6346
Change log message identifier for libmethods.

Refs #6346
Change log message identifier for libremote.

Refs #6346
Rename livestatus classes.

Refs #6346
Fix AExpression log message.

Refs #6346
Change log message identifier for libdb_ido.

Refs #6346
Merge branch 'fix/rename-log-lib-name-6346' into next

Fixes #6346